On the Astromart forums there was a thread about what color is Hydrogen Alpha I think the question may have been better posed as "what color is hydrogen...
Thanks a lot! I was about to ask this here. I have tested this with "primitive" methods and I did end up to very close to this. J-P ... have ... introduces...
tested what? I covered two different things: one was how to approximate the true color of an emission nebula using Halpha and O3 filters and the other was a...
Hi, Here is some samples about what I did. They are direct links to the images. Narrowband colors: http://tinyurl.com/54yb4x First try with natural colors: ...
i like your images a lot What is the technology used for the light sheet? the link on your website says it can be cut and bent so that makes me curious what...
many thanks for noticing Mike I am happy to hear that is useful information for you. It was certainly a great source of information for me when I first saw it...
The material is electroluminescent, you can read more in Wiki: http://en.wikipedia.org/wiki/Electroluminescence There is differen colors for this light, I have...
Hi Richard, If you are looking for a US supplier, here is one: http://www.luminousfilm.com/ I bought the A3 kit, which has a dimmer controllable inverter box. ...
Hi, Yes, mine is fixed one, but it's not too difficult to add a dimmener. I use some sheets of A2 size white paper to controll brightness. I add and remove...
thanks for the link Gerhard ... From: Gerhard Bachmayer To: narrowbandimaging@yahoogroups.com Sent: Friday, October 03, 2008 2:28 AM Subject: [NBI] Re: color...
The subject of flats arises frequently: newbies want to know what they are and why they need them and how to make them and veterans just make them and don't...
... applying flats. It turns out that the FPN limited regime covers the majority of the dynamic range of a sensor and kicks in at 1/PRNU one typo: that should...
After lurking on this site for awhile, I'm finally posting my first image taken with Takahashi FSQ-106N, FLI Proline 16803, FLI 5-7 filter wheel with Astrodon...
would you like some constructive criticism? Â ... From: Michael Vander Vorst <mvvccd@...> Subject: [NBI] My first narrowband: North American & Pelican...
OK, then Michael: Â first off don;t use luminance. There's no good reason to do it and by doing so you are attenuating the [SII] and [OIII] in regions where...
Thanks Richard, I'll work on it over the next few days. Michael ... by doing so you are attenuating the [SII] and [OIII] in regions where there is no Hydrogen...
days :-) ? You may not believe this but I seldom spend more than an hour processing an image my flow is pretty basic: calibrate, register, stack, ddp, (all in...
Thanks, this is really useful. I have learned on thing. If the sensor is with anti blooming feature, like so many of them are. That couces loose of linearity...
I agree with you about the importance of the flats being taken in the linear response range of the sensor but I am curious about your comment that they may...
Hi, Yes it can be that bad, or worse! It depends about anti blooming factor (ABG), well depth and some other factors might be there too. Some sensors have...
I haven't had much experience using the sony sensors the kodak sensors appear to be better than that if you have a steady light source of constant intensity it...
Thanks, Thats pretty much what I have done. I prefer Sonny sensors doe the very minimum noise they have, but my target is pure visual art, so perfect linearity...
not sure Bruce Sony certainly has had their share of financial challenges in the past two to three years: that much I do know I believe it has forced their...
Hi Richard I am just starting off in narrow band imaging. I have a relatively narrow part of sky that is visible (mainly East / South East) so my observing...
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